Further to this thread started by Bryan Holty:
http://marc.theaimsgroup.com/?l=linux-scsi&m=114306885116728&w=2

Here is the reworked patch again. This time it has been
tested with a program provided by Bryan. The patch is
against lk 2.6.16 .

Changelog:
  - when the sg driver is unable to setup direct IO,
    free that scatter gather list prior to falling
    back to indirect IO

Signed-off-by: Douglas Gilbert <dougg@torque.net>

Doug Gilbert